井震结合刻画深水复合重力流水道砂体

Characterization of composite deep-water gravity flow channel sand body by combining well logging and seismic data

针对深水A油田开发井较少、地震资料品质较强的特点,采用井震结合的方法进行深水复合重力流水道复合砂体刻画。首先选取与GR测井曲线相关性强的均方根振幅属性,应用地层切片技术对均方根振幅属性体内插切片,综合解释重力流水道边界。其次建立测井解释砂体与地震数据反演的泥质含量体属性的相关性,综合确定泥质含量体中砂岩相与泥岩相截断值,在泥质含量体中识别出砂岩相。最后利用重力流水道边界对砂岩相模型相进行约束,并排除掉面积很小的砂岩,实现了对复合重力流水道砂体的刻画。

As a deep-water oil field, the P oil field has few develop well and high-quality seismic data, and the method of combination well logging and seismic data was used to characterize the complex sand bodies in deep-water gravity flow channel.Firstly, the root-mean-square amplitude with strong correlation with GR logging curve was selected, the boundary of deep-water gravity flow channel is comprehensively explained by strata slicing technique. Secondly, the cutoff values of sandstone facies and mudstone facies in the argillaceous content body were determined comprehensively, and the sandstone facies was identified in the argillaceous content body. Finally, the gravity flow channel boundary is used to constrain the sandstone facies model, and the composite gravity flow channel sand body was charactered.